Bump xstream from 1.4.10 to 1.4.19 in /itstack-naive-chat-server-ddd#9

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dependabot/maven/itstack-naive-chat-server-ddd/com.thoughtworks.xstream-xstream-1.4.19itstack-naive-chat/itstack-naive-chat-server:dependabot/maven/itstack-naive-chat-server-ddd/com.thoughtworks.xstream-xstream-1.4.19Copy head branch name to clipboard